Data/hora: 23/09/2024 15:42:47

Biblioteca(s): 	Embrapa Cerrados.	
Data corrente: 	22/08/2000	
Data da última atualização: 	22/08/2000	
Autoria: 	GROF, B.; FERNANDES, C. D.; ALMEIDA, C. B.; SANTOS, A. V. dos.	
Título: 	Development of a multicross cultivar of Stylosanthes spp.	
Ano de publicação: 	1999	
Fonte/Imprenta: 	In: INTERNATIONAL GRASSLAND CONFERENCE, 18., 1997, Winnipeg and Saskatoon. Proceedings. [S.l.]: Canadian Forage Council/Canadian Society of Agronomy/Canadian Society of Animal Science, 1999.	
Idioma: 	Inglês	
Notas: 	Grasslands 2000.	
Conteúdo: 	A synthetic population, referred to as multicross, has been developed from an interspecific mixture of Stylosanthes capitata and S. macrocephala germplasm. This basic population evolved in a farm ing situation subject to uncontrolled, continuuous, heavy grazing. Natual selection and systematically programmed intercrossing among anthacnose-resistant Venezuelan and Brazilian genotypes of S. capitata have played najor roles in the subsequent development of this heterogeneous population. Eight anthracnose-resistant Venezuelan and two Brazilian accessions of S.capitata were introgressed into the basic population. Genetioc diversity was further increased by adding seed of four selected accessions of S. macrocephala to the synthetic which had already included three accessions from the basic population. Genetic diversity was futher increased by adding seed of four selected accessions of S. macrocephala to the synthetic which had already included three accessions from the basic population. The composite was advanced through five generations of bulk seed production to improve its stability, synchronise harvest maturity, and primarily to facilitate natural intercrossing among S.capitata genotypes. The multicross population displayed anthracnose-resistance in the presence of susceptible, infected accessions in field trials conducted over the years since its initial synthesis in 1990.	
Palavras-Chave: 	Anthracnosis.	
Thesagro: 	Antracnose; Cerrado; Stylosanthes Macrocephala; Variedade Resistente.	
Thesaurus Nal: 	disease resistance; Stylosanthes capitata.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Cerrados (CPAC)	
Exemplares: 	CPAC - (12221-1) - ADD - PL - -- - CRI5304 -  - CRI5304 - DIS